<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>标题</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="css/bootstrap.min.css">
    <script src="js/jquery.min.js"></script>
    <script src="js/popper.min.js"></script>
    <script src="js/bootstrap.min.js"></script>
</head>
<body>
    <div class="container"><br>
        <div class="row">
            <div class="col col-6"> 1 </div>
            <div class="col col-6"> 2 </div>
        </div><br><nav class="navbar navbar-expand-sm bg-light">
  <ul class="navbar-nav">
    <li class="nav-item">
      <a class="nav-link" href="#">Link 1</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" href="#">Link 2</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" href="#">Link 3</a>
    </li>
  </ul>
</nav>
    </div>

</body>

</html>